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Derivative Instruments and Hedging Activities - Summary of Classification and Fair Values of Derivative Instruments (Detail) - USD ($) $ in Millions | Jun. 30, 2018 | Dec. 31, 2017
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Designated as Hedging Instrument [Member] | Swap [Member] | Accounts Payable [Member] | Cash Flow Hedge [Member] |  |
Derivative [Line Items] |  |
Asset derivatives | $ 37 | $ 25
Designated as Hedging Instrument [Member] | Swap [Member] | Other Current Liabilities [Member] | Fair Value Hedge [Member] |  |
Derivative [Line Items] |  |
Liability derivatives | (16) | (2)
Designated as Hedging Instrument [Member] | Liabilities Derivatives - Interest Rate and Cross Currency Swaps [Member] | Accounts Payable [Member] |  |
Derivative [Line Items] |  |
Liability derivatives | (64) | (96)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Non-current Assets [Member] |  |
Derivative [Line Items] |  |
Asset derivatives | 19 | 17
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accounts Payable [Member] |  |
Derivative [Line Items] |  |
Liability derivatives | $ (17) | $ (15)

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